Manufacture of building blocks and bricks



COATING R PLASTIC.

Patented Aug. 14, 1923.

UNITED STATES MK COB-DERY, OI TOLEDO, OHIO.

IANUFAUIUBE 0]! BUILDING BLOCKS AND BRICKS.

Io Drawing.

a forced e or boiler and in who e said slag, in substantlally pulverulent condition, is mixed with other substances and the mass, in plastic condition, is subjected to reduction to the desired shapes for building purposes.

Different processes have heretofore been employed for the manufacture of building blocks of the general character stated, all of which, so far as I am aware, are subject to more or less disadvantages, either in the process ofmaking or in. the formation of imperfect blocks whose final hardening is such that they become more or less brittle, subject to cracking and lacking the strength required for the uses to which they may be p In some of the processes heretofore used in the manufacture of building blocks of the kind stated, the cost of producing the product is high and the time needed in develo ing the finished product is long and t e product is not of sufiicient uniform hardness to meet the desired requirements.

Further, in some of the processes heretofore employed, the material is subjected to a heating action and after heating, lime is added to the preheated material or ingredients and the whole is subjected to further heating, usually by placing the preheated 'mass into a drum an subjecting 1t to high pressure steam charges as it is moved or agitated within the drum.

Such methods of forming blocks whose base is composed of ulverized cinders or clinkers from blast rnaces are more or less expensive.

The primary object of my invention is to provide a building block or brick of the general type stated, in the making of which the use of steam or other heating means is 55 not necessary, the production of the block is Application lled larch 3, 1921.

ment and the two substances as saturated with maagg'nm chloridg mixed water pr Serial 80. 9,516.

much simpler and less expensive and the process ste s of handling the substance, as it is deve oped to the desired building shapes, are less than has, so far as I know, been heretofore done.

Another object of my invention is to provide a building block of the kind stated that is practically waterproof, that will quickly assume the desired condition for use and will withstand greater compression than is found in the use of the usual types of cement and sand blocks.

With further objects-in view that will hereinafter be a arent, my invention comprehends a buil d ing block embodying the composition of elements and the method of vmaking the same as is fully explained in the following detailed description and as is specifically stated in the appended claims.

In the practical development of my method of making building blocks of the general type referred to, the basic substance 1 of which the block is composed is clink and cinders furnace slag: is reduced :5 a

ne y pow ere con 10 and the substantially pulverized slag is mixed with are) with water.

Inmce, the magnesium chloride and water are mixed in the proportions of one gallon a saturated solution of magnesium chloride water to eight gallons of water. The cinders and clinkers are of equal proportions, preferably four to six to one of ortland cement, and the several ingredients, as a whole, are properly mixed and made plastic and in t e plastic condition, the mixture is laced in molds.

When thus seed, the mixture is tamped or compressed in any approved manner to make the mas a solid body, which as it hardens, becomes of great strength and uniformly solid throughout.

The ma osium chloride diluted r with uces a chemical action :on the. Portland cement, which causes such cement to readily set and in a manner that causes the ingredients to assume a solid mass, which is practicall waterproof.

My me 0d of formin a plastic material adapted for be' mol ed to the desired sha s as stated, w an subjected to pressure an allowed to produces a block for the purposes stated at will stand more compression than is possible in the standard types of cement and sand blocks."

t is to be noted that in my process of makin the block, at no time is it necessary to sub ect the mixture to action of steam to com lete the hardening process.

nd stated, difiers, so far as I know, from the different methods of manufacturing similar blocks heretofore employed, in that, in my said method of making the blocks, the manufacture of the blocks is inexpensive, since it is not necessary to g: through so many process steps. The bloc produced by my method being waterproof II n I: nu; 0| I an necgssaqg-fierme of magnesium chloride, d1 uted with water, as stated, producing a chemical action on the cement, causes the .mass to quickly and firmly set without in any manner rendering the product brittle or subject to cracking, chipping or splitting.

.What I claim 1s: 7 1. The herein described method of manufacturing building blocks, comprising the mixture of pulverized slag and Portland h Lmethod of making buildlng blocks of t e cement with a saturated solution of magnesium chloride mixed with water in proportions of one gallon of dissolved magnesium chloride to eight llons of water, the slag and the cement being proportioned from four to six parts of pulverized slag to one part of cement, and the whole reduced to plastic condition in shape for being molded and pressed.

2. As a new article, a building block composed of dried out pulverized slag, Portland cement and magnesium chloride.

FRANK COR-DERY. 

